123730406 has 4 divisors (see below), whose sum is σ = 185595612. Its totient is φ = 61865202.

The previous prime is 123730379. The next prime is 123730421. The reversal of 123730406 is 604037321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30932600 + ... + 30932603.

It is an arithmetic number, because the mean of its divisors is an integer number (46398903).

Almost surely, 2^123730406 is an apocalyptic number.

123730406 is a deficient number, since it is larger than the sum of its proper divisors (61865206).

123730406 is an equidigital number, since it uses as much as digits as its factorization.

123730406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61865205.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 123730406 is about 11123.4170109728. The cubic root of 123730406 is about 498.3014443514.

Adding to 123730406 its reverse (604037321), we get a palindrome (727767727).

The spelling of 123730406 in words is "one hundred twenty-three million, seven hundred thirty thousand, four hundred six".